Determination of electron affinity of electron accepting molecules |
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Authors: | Kaname Kanai Kouki Akaike Kiichirou Koyasu Kentaro Sakai Toshio Nishi Yasunori Kamizuru Tatsuhiko Nishi Yukio Ouchi and Kazuhiko Seki |
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Institution: | (1) Research Center for Materials Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan;(2) Department of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan |
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Abstract: | The unoccupied π
* states of the solid film of electron accepting organic molecules, 7,7,8,8-tetracyanoquinodimethane (TCNQ), fluorinated TCNQ
derivatives, 11,11,12,12-tetracyanonaphtho-2,6-quinodimethane (TNAP), C60, and 6,6-phenyl-C61-butyric acid methyl ester (PCBM) have been studied by inverse photoemission spectroscopy. The assignment of the π
* affinity levels of these typical electron accepting molecules provides the basic information for the organic electronics
and the new electronic functional molecular design. The comparison with density functional theory calculations enables understanding
how the electron affinity evolves in terms of molecular orbitals. The correlation between the film morphology and the irradiation
damage on the TCNQ derivative samples by electron impact during the inverse photoemission measurements is also discussed. |
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Keywords: | PACS" target="_blank">PACS 71 22 +1 73 20 At 79 60 Fr |
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